{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AYDHJVUXHT6D2UOH5GE2EGSZ2Q","short_pith_number":"pith:AYDHJVUX","canonical_record":{"source":{"id":"1803.00943","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-03-02T16:44:08Z","cross_cats_sorted":[],"title_canon_sha256":"de8447ea8416df089162d738cf4fb9778bbf0a9c636380f69aed34b66a5879d2","abstract_canon_sha256":"ee437101220a76f9a0313828791f5d77d60aacd0c1ad22dbf77cebd247cf1c95"},"schema_version":"1.0"},"canonical_sha256":"060674d6973cfc3d51c7e989a21a59d43be95f919c23a853f435cfd4c9fea35b","source":{"kind":"arxiv","id":"1803.00943","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.00943","created_at":"2026-05-18T00:13:27Z"},{"alias_kind":"arxiv_version","alias_value":"1803.00943v1","created_at":"2026-05-18T00:13:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.00943","created_at":"2026-05-18T00:13:27Z"},{"alias_kind":"pith_short_12","alias_value":"AYDHJVUXHT6D","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AYDHJVUXHT6D2UOH","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AYDHJVUX","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AYDHJVUXHT6D2UOH5GE2EGSZ2Q","target":"record","payload":{"canonical_record":{"source":{"id":"1803.00943","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-03-02T16:44:08Z","cross_cats_sorted":[],"title_canon_sha256":"de8447ea8416df089162d738cf4fb9778bbf0a9c636380f69aed34b66a5879d2","abstract_canon_sha256":"ee437101220a76f9a0313828791f5d77d60aacd0c1ad22dbf77cebd247cf1c95"},"schema_version":"1.0"},"canonical_sha256":"060674d6973cfc3d51c7e989a21a59d43be95f919c23a853f435cfd4c9fea35b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:27.344228Z","signature_b64":"qC/5Q+HViYA5Q1C/12yIBHL764zjjUshMP3iumXXnf5tcgsv7bq8xrG6yIhGS8evnagla9ctFor+lyTQGCJTCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"060674d6973cfc3d51c7e989a21a59d43be95f919c23a853f435cfd4c9fea35b","last_reissued_at":"2026-05-18T00:13:27.343695Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:27.343695Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.00943","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:13:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EPWPPMaYBzkoyrVg0fQnnuB1GU06FETp4MnCz1BQer0xV+UAQR4lGWvODNecWxgay5JWTk6ilj/MK2ZWyKM8Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:18:07.644221Z"},"content_sha256":"cc3b38ef7e7676e1700fe8545618caf1608b196eed1b740243ad9093ea5cce52","schema_version":"1.0","event_id":"sha256:cc3b38ef7e7676e1700fe8545618caf1608b196eed1b740243ad9093ea5cce52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AYDHJVUXHT6D2UOH5GE2EGSZ2Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Widespread HCN maser emission in carbon-rich evolved stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(2) Instituut voor Sterrenkunde, 2) T. Kami\\'nski (3) ((1) Max-Planck-Institut f\\\"ur Radioastronomie, (3) Harvard-Smithsonian Center for Astrophyics), D. Keller (1, F. Wyrowski (1), Katholieke Universiteit Leuven, K. M. Menten (1)","submitted_at":"2018-03-02T16:44:08Z","abstract_excerpt":"Context. HCN is a major constituent of the circumstellar envelopes of carbon-rich evolved stars, and rotational lines from within its vibrationally excited states probe parts of these regions closest to the stellar surface. A number of such lines are known to show maser action. Historically, in one of them, the 177 GHz $J=2\\rightarrow1$ line in the $l$-doubled bending mode has been found to show relatively strong maser action, with results only published for a single object, the archetypical high-mass loss asymptotic giant branch (AGB) star IRC+10216. Aims. To examine how common 177 GHz HCN ma"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.00943","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:13:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Kp/+/NgyXcTy/cLGxHOyTDKBAc6MNBUov15VZKMpEiYwxoOI/x8EKEPxPQqTqh2r0w1ivVVAQbO5lEPXH9EBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:18:07.644578Z"},"content_sha256":"4c95fd26544e4ce552b5b6b85a5a67d12a8c0793f03cc901d27d6071bb732239","schema_version":"1.0","event_id":"sha256:4c95fd26544e4ce552b5b6b85a5a67d12a8c0793f03cc901d27d6071bb732239"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q/bundle.json","state_url":"https://pith.science/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T02:18:07Z","links":{"resolver":"https://pith.science/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q","bundle":"https://pith.science/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q/bundle.json","state":"https://pith.science/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AYDHJVUXHT6D2UOH5GE2EGSZ2Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AYDHJVUXHT6D2UOH5GE2EGSZ2Q","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ee437101220a76f9a0313828791f5d77d60aacd0c1ad22dbf77cebd247cf1c95","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-03-02T16:44:08Z","title_canon_sha256":"de8447ea8416df089162d738cf4fb9778bbf0a9c636380f69aed34b66a5879d2"},"schema_version":"1.0","source":{"id":"1803.00943","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.00943","created_at":"2026-05-18T00:13:27Z"},{"alias_kind":"arxiv_version","alias_value":"1803.00943v1","created_at":"2026-05-18T00:13:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.00943","created_at":"2026-05-18T00:13:27Z"},{"alias_kind":"pith_short_12","alias_value":"AYDHJVUXHT6D","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AYDHJVUXHT6D2UOH","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AYDHJVUX","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:4c95fd26544e4ce552b5b6b85a5a67d12a8c0793f03cc901d27d6071bb732239","target":"graph","created_at":"2026-05-18T00:13:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Context. HCN is a major constituent of the circumstellar envelopes of carbon-rich evolved stars, and rotational lines from within its vibrationally excited states probe parts of these regions closest to the stellar surface. A number of such lines are known to show maser action. Historically, in one of them, the 177 GHz $J=2\\rightarrow1$ line in the $l$-doubled bending mode has been found to show relatively strong maser action, with results only published for a single object, the archetypical high-mass loss asymptotic giant branch (AGB) star IRC+10216. Aims. To examine how common 177 GHz HCN ma","authors_text":"(2) Instituut voor Sterrenkunde, 2) T. Kami\\'nski (3) ((1) Max-Planck-Institut f\\\"ur Radioastronomie, (3) Harvard-Smithsonian Center for Astrophyics), D. Keller (1, F. Wyrowski (1), Katholieke Universiteit Leuven, K. M. Menten (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-03-02T16:44:08Z","title":"Widespread HCN maser emission in carbon-rich evolved stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.00943","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:cc3b38ef7e7676e1700fe8545618caf1608b196eed1b740243ad9093ea5cce52","target":"record","created_at":"2026-05-18T00:13:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ee437101220a76f9a0313828791f5d77d60aacd0c1ad22dbf77cebd247cf1c95","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-03-02T16:44:08Z","title_canon_sha256":"de8447ea8416df089162d738cf4fb9778bbf0a9c636380f69aed34b66a5879d2"},"schema_version":"1.0","source":{"id":"1803.00943","kind":"arxiv","version":1}},"canonical_sha256":"060674d6973cfc3d51c7e989a21a59d43be95f919c23a853f435cfd4c9fea35b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"060674d6973cfc3d51c7e989a21a59d43be95f919c23a853f435cfd4c9fea35b","first_computed_at":"2026-05-18T00:13:27.343695Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:13:27.343695Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qC/5Q+HViYA5Q1C/12yIBHL764zjjUshMP3iumXXnf5tcgsv7bq8xrG6yIhGS8evnagla9ctFor+lyTQGCJTCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:13:27.344228Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.00943","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc3b38ef7e7676e1700fe8545618caf1608b196eed1b740243ad9093ea5cce52","sha256:4c95fd26544e4ce552b5b6b85a5a67d12a8c0793f03cc901d27d6071bb732239"],"state_sha256":"a81181b971a3774ef01ba68860b841e79d2a5ddb9d841586ab8f77dbf80aa810"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"twYWD9HlMcsyuhg0oCcK7nvBr9oIdAd2kuQyvmtvVrwced1TLbiFuOkIRrwF5PwehEJPWmAWoqPTLZW/pGe6CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T02:18:07.646528Z","bundle_sha256":"a035278b436e0942b6255005ba8299896f035065b85698a5ceecdd57e595ddcc"}}